#25554F
Closest named color: Dark Slate Gray (#2F4F4F). oklch(41.4% 0.053 184.6), rgb(37, 85, 79).
Aa
White text reads best on this color (8.43:1).
About this color
#25554F is a dark, muted teal or cyan. In OKLCH its lightness is 41%, its chroma 0.053 and its hue 185°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Slate Gray (#2F4F4F), ΔE 0.021 away. White text reads best on it, at 8.43:1.
| Hue family | Teals and cyans |
| Lightness | dark (41%) |
| Chroma | muted (0.053) |
| Temperature | cool |
| Nearest name | Dark Slate Gray (#2F4F4F) |
| Black text | 2.49:1 |
| White text | 8.43:1 |
Values
| HEX | #25554F |
| RGB | rgb(37, 85, 79) |
| HSL | hsl(173, 39%, 24%) |
| OKLCH | oklch(41.4% 0.053 184.6) |
Contrast
WCAG 2 contrast ratios are the conformance target: AA needs 4.5:1 for body text and 3:1 for large text, AAA needs 7:1. APCA Lc values are supplementary guidance from the WCAG 3 drafts.
| Pair | WCAG 2 | Result | APCA | APCA guidance |
|---|---|---|---|---|
| White text on #25554F | 8.43:1 | AAA | Lc -93.5 | Preferred for body text |
| Black text on #25554F | 2.49:1 | Fails | Lc 15.1 | Dividers and decoration only |
| #25554F text on white | 8.43:1 | AAA | Lc 88.9 | Fine for body text |
| #25554F text on black | 2.49:1 | Fails | Lc -13.3 | Not readable |
Tints and shades
A 50–950 scale built in OKLCH: the hue is held, lightness follows a Tailwind v4-like curve, and every step is kept inside the sRGB gamut. This color sits at step 800.
-
Step 50
50
#F2F6F6
oklch(97% 0.004 197.1)
-
Step 100
100
#E4ECEA
oklch(93.6% 0.009 179.6)
-
Step 200
200
#CDDDDA
oklch(88.5% 0.018 183.5)
-
Step 300
300
#ABC8C3
oklch(81% 0.032 184)
-
Step 400
400
#7EABA4
oklch(70.7% 0.049 184.3)
-
Step 500
500
#5B968E
oklch(63% 0.063 184.8)
-
Step 600
600
#3E8178
oklch(55.7% 0.07 183.9)
-
Step 700
700
#306D65
oklch(49.2% 0.065 184)
-
Step 800
800 (this color)
#25554F
oklch(41.4% 0.053 184.6)
-
Step 900
900
#264944
oklch(37.7% 0.042 183.9)
-
Step 950
950
#172B28
oklch(27.1% 0.027 183.8)
#25554F with color blindness
Simulated with the Machado et al. (2009) model. ΔE is how far the color moves: below about 0.02 you would not notice a change.
| Vision | Seen as | Shift (ΔE) |
|---|---|---|
| Protanopia (no red cones) | #51514F | 0.056 |
| Deuteranopia (no green cones) | #494B50 | 0.053 |
| Tritanopia (no blue cones) | #085753 | 0.016 |
| Achromatopsia (no color) | #4D4D4D | 0.054 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #25554F
#25554F
oklch(41.4% 0.053 184.6)
- #643F48
#643F48
oklch(41.4% 0.053 3.8)
Analogous
Neighbouring hues, 30° either side.
Split complementary
The two hues beside the complement (150° and 210°).
Triadic
Three hues spaced 120° apart.
Palettes with this color
Curated palettes that contain a color within ΔE 0.04 (OKLab) of #25554F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Gray #2F4F4F ΔE 0.021
- Deep Teal #00555A ΔE 0.025
- Dark Blue Green #005249 ΔE 0.027
- Dark Teal #014D4E ΔE 0.037
- Dark Green Blue #1F6357 ΔE 0.043
- Petrol #005F6A ΔE 0.046
- Charcoal #264653 ΔE 0.053
- Pine #2B5D34 ΔE 0.057
Use #25554F in your product
Turn it into light and dark UI roles checked for contrast, then export to Tailwind v4, shadcn/ui, CSS or design tokens.